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EQUITY COMPENSATION PLANS AND STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total stock-based compensation expense $ 189,711 $ 159,865 $ 148,819
Cost of sales      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total stock-based compensation expense 26,246 16,146 13,558
Research and development      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total stock-based compensation expense 61,942 56,649 57,557
Selling, general and administrative      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total stock-based compensation expense $ 101,523 $ 87,070 $ 77,704